Nilavembu Benefits, Uses, Dosage & Side Effects

Nilavembu (also called Siriyanangai) is a Siddha herb used for its antipyretic, bitter, digestive, cholagogue, hepatoprotective, and anti-inflammatory properties. It is useful in the treatment of intermittent fever, malaria, chronic fever, dengue fever, chikungunya and all diseases in which fever is the main symptom.

Nilavembu alleviates fever, protects the liver, and provides strength to the body. It is also indicated in physical debility occurring after fever. It stimulates hepatic functions, improves appetite, enhances digestion, boosts metabolism, and reduces after effects of several medicines on the liver.

Phytochemistry (Chemical Composition)

Nilavembu contains four major diterpenoids:

Andrographolide (AP1)

14-deoxy-11, 12-didehydroandrographolide (AP3)

Neoandrographolide (AP4)

14-deoxyandrographolide (AP6)

The main bioactive constituent of the nilavembu plant is Andrographolide. In the whole plant, it is present around 81-186 milligram per gram (mg/g). In flowers, it is detected up to 43.16 mg/g. Isoandrographolide, Neoandrographolide and Bisandrographolide A are found in cotyledons. The high content of 14-deoxyandrographolide is found in young leaves, which varies from 10.67 to 24.54 mg/g. Other constituents such as Andrograpanin, 7-O-Methylwogonin, Skullcapflavone I, 3,4-Dicaffeoylquinic acid, Onysilin are also present. (1, 2)

Medicinal Properties

Nilavembu has following medicinal properties.

Antipyretic

Anti-microbial

Anti-protozoan

Anti-infective

Insecticidal

Anti-oxidant

Anti-inflammatory

Immunostimulant

Anti-diabetic

Bitter

Blood detoxifier

Digestive

Cholagogue

Hepatic stimulant

Hepatoprotective

Nephroprotective

Nilavembu also has anti-proliferation activity observed in colon cancer. It also modulates sexual functions by increasing blood flow to penile tissue and relaxing smooth muscles. Andrographolide in it initially increase serum testosterone, but after its regular use for 6-8 weeks, testosterone starts declining to normal levels. (3)

Nilavembu Indications

Therapeutic indications of Nilavembu are as follows:

Intermittent fever

Malaria

Chronic fever

Dengue fever

Chikungunya

Post fever debility

Loss of appetite

Hepatomegaly

Fatty liver syndrome

Jaundice

Incomplete evacuation

Mild constipation

Intestinal parasites

Snakebites

Insect Stings

Sore throat

Nilavembu Plant Image

Nilavembu Benefits & Medicinal Uses

Nowadays, Nilavembu became famous for its beneficial effects in Dengue fever and Chikungunya. It is used in these diseases along with other 8 herbs in form of decoction. Here we will discuss the major health benefits of Nilavembu.

Malaria

Nilavembu has anti-malaria potential, which is attributed to its anti-parasitic action. It inhibits the growth of malaria parasite during the ring stage. (4)

After effects of Dengue and Chikungunya

The most patients suffered from dengue and Chikungunya have complaints of the following after effects:

Myalgia – muscular pains

Polyarthralgia – persistent pains in several joints

Physical debility

Loss of appetite

Nilavembu and its formulations help to prevent these after effects if taken during the management of these infections. If the patient has not taken it during treatment of infections, it can also help to treat these after effects. It removes toxins from the body and alleviates muscle pain and joint pain. It improves appetite and restores the vitality. Hence, it also reduces debility. For the best results, it can be used along with Ashwagandha or Amukkara Choornam. Some patients might also require Maha Yograj Guggulu in case of the dominance of Vata Dosha or Kapha Dosha and Panchamrit Lauh Guggulu in the dominance of Pitta Dosha.

Intermittent Fever

Nilavembu is commonly used in natural medicine for treating intermittent fever. According to Ayurveda, there is a toxin called AMA that accumulates in the body. However, it builds in the body due to poor digestion in case of infections. This remedy burns the AMA and eliminates it from the body, which helps to treat intermittent fever.

Post fever debility

According to Ayurveda, Nilavembu is a bitter rejuvenator. It prevents post fever debility and strengthens the digestive system and restores vitality to the body. It is commonly used for treating physical debility occurring after fever or chronic diseases, especially when it is associated with loss of appetite.

Loss of appetite

Nilavembu improves appetite by improving liver functions. It has cholagogue property, so it stimulates the secretion of bile. It further modulates the secretion of gastric juices. Ultimately, improves appetite. However, it is indicated mainly in loss of appetite occurring after infection or during chronic fever.

Nilavembu Side Effects

Generally, there are no side effects when Nilavembu is used wisely in patients with the dominance of Kapha Dosha and Sama Pitta Dosha. It also does not increase Vata Dosha due to its hot potency, so it can also be used for relieving pain along with other Vata pacifying herbs.

Research studies also have not reported any significant adverse effects. However, it generally has mild and infrequent adverse events, these adverse effects are not significantly different than placebo. (13, 14, 15, 16, 17)

Nilavembu Flower

Allergic Reaction

One study found allergic reaction with isolated Andrographolide in 2 subjects. (18)

There is no allergic reaction found with crude and natural form of Nilavembu.

Contraindications

Nilavembu might affect delaying clotting time. Therefore, it should not be taken before and after surgery. People with bleeding disorders should also avoid it.

Pregnancy & Lactation

The safety profile of Nilavembu is not well established for pregnant women and lactating mothers. Consult a Siddha physician before using Nilavembu during pregnancy and lactation. However, the therapeutic dose of Nilavembu is not likely to cause any adverse event or induce a miscarriage. (19)

The long-term use of Nilavembu in high doses might have contraceptive effects, according to an animal study. The study concludes antifertility effects due to a reduction in spermatogenesis. (20) However, there are no such effects appear in human, according to several clinical trials.

For the precautionary purpose, people having trouble with fertility or trying for conceiving a baby should avoid Nilavembu.

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Dr. Jagdev Singh (B.A.M.S., M. Sc. in Medicinal Plants) is a Licensed Ayurvedic Practitioner under Central Council of Indian Medicine (CCIM) Act India and Board of Ayurvedic and Unani Medicine, Chandigarh since 2010. He is running his ‘Ayurveda Clinic’ in Rupnagar, Punjab, India.

He has successfully treated thousands of patients with Ayurvedic Medicine and Ayurvedic Diet. Ayur Times is an initiative of his efforts to bring quality information on Indian Medicine with the highest level of relevancy and scientific evidence.